Tank and method of making



R. F2. REISSIG TANK AND METHOD OF MAKING Filed March '7. 1923 INVENTOR plurality of battles. 20

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TANK AND :METHOD 01E To all whom t may concer/n.: Be it known that l, RUDOLF R. Rinssie, a `citizen of the United Sta-tes, residin at `Roosevelt, inthe county of Nassau and tate of New York, have invented certain new and useful improvements in rllanks and Methods of Making, of which the following is a.

specication.

My invention relates to containers and more particularly `to meta-l tanks, i. e., gasolene, oil' and other tanks used on or in connection with aeroplanes, automobile andl other automotive vehicles. Heretotore, gas tanks, andl especially the gas tanks of aeroplanes, due to the volume of as contained therein and to the constant shi ting of the tank relatively to the horizontal, have been provided with one or a Such baffles not only reinforce the tank but they very appreciably reduce the bulk movemen-t of the liquid as the position ofthe tank shifts.' @rdinarily such baffles are riveted in place. Rivets, however, as a means for fastening the bafes, are objectionable. Leaks are likely to occur, due to vibration, and in the construction of the tank it is necessary that 'a portion of the work be carried on from the inside. Moreover, in the construction of aeroplane tanks, due to the large volume of gasolene required to be carried, and to the constant shifting of the confined liquid, mass, rivets frequently work loose, the re-V sult being a loss of gas and an ever present possibility of fire.

To overcome the above objectionable `features, attempts have been made to secure the baiiies in place by welding. This method, if carried on in the ordinary or well known 4@ manner, is unsatisfactory because of the heat eiect on the metal; the result being a warped tank with a metal shell very noticeably distorted. To avoid such distortion and to secure a strong and leakproof fastening for the baiiles, is a particular object of this invention. Warping is eliminated by crimping or corrugating the metal tank along the line of attachment of the baflie, such intentional deformation of the tank resultingr in a localization of the heat during the welding operation. The edges` of the-battle are Application tiled Meren 7, 1923. Serial No. @23,5%3.

let through openings in the Ametal shell and the projecting portions welded upon the tank exterior. ln this way an inter-lock is provided, the welded joint eilectually sealing the opening or openings through which the projecting portion orpofrtions of the bao extend. Furthermore, during the welding process, all work is carried on trom. the outside. Y

A tank characmrized as last above set forth is durable, light and strong. Such a tank is especially adapted to the aeroplane. llt. can be manufactured economically, and throu the use oli a number of bames, it (the tank) can be made as large as desired -w'ithontdeforming the shell in the making or straining the shell due' to the mass movement of its contents.

Other objects and advantages of the invention will be hereinafter morefully -enplained. i

'ln the drawings, wherein, like reference characters denote like or corresponding parts. i

Fig. l is a side elevation of a metal tank provided with a single baie fastened in place by welding as herein disclosed;

Fig. 2 is an enlarged transverse sectional View taken on the line 2 2 of Fig. l;

Fig.' 3 is a fragmentary sectional view showing the tongue formation before weld- Hle'; 'Y

Fig. t is a section on the line 4.-4: of Fig. 3, and

Fig. 5 is a view similar to Fig. l showin the connection as it appears when weide ln the embodiment of the invention selected for illustration, 10 designates a gas tank preferably constructed of aluminum. Such tank comprises an outer shell 11, an inte-rmediate baile 12 and end pieces ,13, the latter being fastened on the inside of the shell in any suitable manner. The balile l2 is provided with a plurality oi openings 14. to permit of the transfer of `the liquid contents of the tank from one to the other side of the baille. l't is further provided with a plurality of tongues or projecting portions l5, each of which is adapted to engage in an opening` 16 formed in the metal shell. 'lhe metalshell 1l, immediately of its ends, is

as desired. The shell l1 is then wrapped.

around the battle so as to cause the tongues l5 thereof to enter the openings 16 formed in the double corrugation. Shoulders 18 formed on the tongues l5 bear against the inner wall of the shell to pref-:ent the tongues from entering into the openings beyond the desired distance. lilith the tongues l5 thus projected through the openings 16, the projected portion of eac-h tongue is welded to the outer surface of the shell, such Weld providing in effect an interlock between the baffle and the shell and at the same time effectually sealing1 the several openings. As an aid in effecting a. proper weld the tongues l5 are split, as indicated at 19, whereby the edges thereof may be turned or peaned over as indicated at 20 upon the outer face of the shell at the ends of the slots or openings 16.

In providing a double corrugation along the line of weld the heat, during a welding operation, is localized and the metal shell prevented from warping. By extending the tongues through the outwardly directed apex of the double corrugation such tongues are rendered more accessible and the welding operation accordingly simplified. In attempting to weld without the double corrugation,

it has been found that the etlectof the heat in welding upon the metal shell is such that the tank is Warped and twisted to such an extent as to ofttimes render it unfit for use. It has been further found that by crimping or corrugating the shell, as herein illustrated, the heat effect is localized and all distortionl or deformation eliminated.

From the above it is obvious that an exceptionally strong fastening for the baille is obtained through the use of the methods herein outlined. It is further obvious that the entire welding process is carried on from the outside of the tank and that the fusion of the metal occurson the opposite side of the shell from that against which the shoulders 18 of the tongues abut. Such a connection or fastening ives maximum strengthy and at the same t1me renders the connection absolutely leak-proof.

While I have described my invention in detail in its p resent preferred embodiment, it will be obvious to -those skilled in the art after understanding my invention, that various changes and 'modifications may be' made therein without departing from the spirit or scope thereof. I aim in the appended claims to cover all such modifications and changes.

`What is claimed is:

l. A. tank comprising an outer shell provided with an opening, a corrugation formed in the outer shell, said opening being formed within said corrugation, a part extended off from said outer shell at an angle, said part being provided with a projecting portion which engages in said opening, and a fastening for said part formed by welding such projecting portion and said outer shell together. A 2. il tank comprising an outer shell provided with a plurality gation formed in the outer shell, said openings being formed within said corrugation, a battle extended olf from said .outer shell at an angle, tongues formed upon said bathe yfor fitting engagement in said openings, and a fastening for said baille formed by Welding the tongues to said outer shell, the nature of the weld being such that for each opening a closure is provided.

3. A tank comprising an outer shell provided with a plurality of slotted openings, a double corrugation formed in said outer shell, said double corrugation being so related to said slotted openings that a single corrugation is disposed on either side thereof, a batlle extended off from said outer shell at an angle and having its marginal portions engaginflr in the outwardly directed channel formed by said double corrugation, tongues of openings, a corraformed upon said baille for fitting engagej ment in said slotted openings, and a fastening for said baille formed by welding the tongues to said outer shell, the nature of the weld being such that for each slot a closure is provided.

4. A method of fastening battles in tanks which consists in extending portions of said baille through openings in the tank wall and fusing such extended portions until a Welded joint between the baille and the tank and closures for said openings are provided.

5. A method of fastening baffles in tanks which consists in corrugating the tank and puncturing the wall of the corrugation, in letting portions of the baille extend through the openings in the cori-ligation, and in fusing such extended portions until a welded joint between the baille and closures for said openings are provided.

6. The method of fastening baiiles in tanks which consists in corrugating the tank and puncturing the wall of said corrugation at spaced intervals along its apex, in lettinoi portions of the battle extend through the openings inthe corrugation, and in fusing such extended portions until a welded joint between the baille and the tank and closures for said openings are provided upon the exterior of the tank and at the apex of said corrugation.

7 The method of fastening battles in tanks which consists, first in corrugating the wall llO of the tank to the end that two parallel well as through said openings, and finally juxtaposed oorrugations are provided, next in fusing the extended portions until a weldin puneturing said tank along the outwardly ed joint between the baie and thetank and -10 directed apex of the wall of said double closures for said openings are provided.

5 corrugation, next in extending portions of In testimony whereof I hereunto aifix my the baffle into the outwardly directed chansignature. nel formed by said double corrugation as RUDOLF R. REISSIG. 

